Question

Professor Hardtack chose a sample of 7 students from his marketing class that has 35 students. The 7 students wore a red polo that day. What kind of sample is this?

A. Simple random sample.

B. Stratified sample.

C. Systematic sample.

D. Convenience sample.

Which of the following is quantitative data?

A. The gender.

B. The cell phone brand of your property.

C. Whether or not you have an American Express card.

D. The number of people who used the New York subway between 1:00 pm and 2:00 pm during the month of February.

Which of the following options is a time series?

A. The M1 component of the US money supply (n = 20 quarters).

B. "Unemployment rates for all US states in the year 1,999 (n = 50 states)."

C. "The Gross Domestic Product for the members of the European Economic Community in the year 2,010 (n = 15 countries)."

D. The inflation rate in the US metropolitan areas in the month of last February (n = 46 cities).

"Histograms usually do not reveal the"

A. The standard deviation of the distribution.

B. "If the distribution is unimodal, bimodal, etc."

C. The skewness of the distribution.

D. The presence of outliers.

What data would be suitable for a pie chart?

A. Sales revenue from Whirlpool Corporation for the last 10 years.

B. "Proportion of students enrolled at the University of Turabo by category (bachelor's, master's, doctorate)."

C. The GPA average for freshmen from 100 US universities.

D. The price-benefit ratio of the 80 most publicly traded shares.

The following histogram shows the score achieved by Chris in his last 77 rounds in the last golf tournament.

Point out the wrong thing?

A. The number of intervals (bins) is consistent with the Sturges Rule.

B. The scores were mostly between 78 and 80.

C. Values ​​between 74 and 76 are not outliers.

D. "About 19% of its rounds are in the interval [74,76]."

Answer 1

1)-(D) Selecting 7 students who wore a red polo from a group of 35 students is an example of convenience sampling.

convenience sampling is a type of sampling in which sample is collected from people who are easy to reach.as students wearing red polo are easy to identify they are selected.

2)-(D) As in this case Quantitative data is collected where as in other option there is no quantitative data collected.

3)-(A) data of M1 component of the US money supply taken over 20 quarters is data taken over a time period of 20 quarters hence this represent time series.time series an be defind as series of data over a period of time.

4)-(A) from looking at histogram we find out whether it is unimodal or bimodal . Its skewness and also outliers .we can not find standard deviation by looking at a histogram

5)-(B) proportion of students enrolled at university.we can the pie chart in different group according to proportion of studying in bachelor's,master's,doctorate.

*SIXTH question do not have the image of related histogram.